Final answer:
The statement that mammals are the only animals to experience REM sleep is false OPTION B IS ANSWER
Step-by-step explanation:
The assertion that mammals are the only class of animals that experience REM sleep is false. REM sleep has been observed in other animals outside of the mammalian class, such as birds and some reptiles.
While mammals are indeed a class of endothermic vertebrates with characteristics such as hair, mammary glands, a four-chambered heart, and complex brains, they are not unique in their ability to experience REM sleep.
When discussing mammalian diversity, it's important to note the wide array of habitats in which they live and the various adaptations they have developed to survive. For example, there are three main groups of living mammals—monotremes, marsupials OPTION B IS ANSWER